I had my flu jab a few days ago. Today I woke up and appear to have two different types of rash. One under my right boob is like a red horizontal strip that is itchy. On the other side at the back, I have more of a blotchy raised rash. Non itchy. I’m trying to figure out what they are and that is the only thing I can think of. Would a reaction be delayed though? I have also been not 100% well off and on since the past few weeks where I had a stomach bug type virus plus cold symptoms (testing negative on lateral flow and pcr) I also had none of the main three symptoms for that. Now my mind is spinning. Could it be a post viral rash?